CN219246786U - An air-cooled battery system - Google Patents

Abstract

The utility model belongs to the technical field of batteries, and particularly discloses an air-cooled battery system, which comprises a shell, battery modules and a heat radiation assembly, wherein an air inlet hole is formed in the shell, each battery module comprises a plurality of electric cores which are arranged at intervals, a first air channel is arranged between two adjacent electric cores, a second air channel is formed between one end of each battery module along the arrangement direction of the electric cores and the shell, the first air channel and the second air channel are communicated with the air inlet hole, a third air channel is formed in the heat radiation assembly, one end of the third air channel is communicated with the first air channel and the second air channel, and the other end of the third air channel is communicated with the external environment, so that two heat radiation paths are formed in the shell of the air-cooled battery system. One heat dissipation path takes away most of heat of the battery cells through a large-surface heat dissipation mode, the overall temperature of the battery module is reduced, and the other heat dissipation path forms internal circulation air inlet in the shell, so that air flow in the shell is increased, the temperature difference between the battery cells is reduced, and the service life of the battery cells is prolonged.

Description

An air-cooled battery system

technical field

The utility model relates to the technical field of batteries, in particular to an air-cooled battery system.

Background technique

With the development of new energy vehicles, due to their energy saving and low environmental pollution, they gradually have a tendency to replace traditional fuel vehicles. During this development process, a series of hybrid vehicles have emerged. Currently, common hybrid batteries include air-cooled battery systems. , the air-cooled battery system will generate a lot of heat during the charging/discharging process.

In the prior art, the air-cooled battery system generally adopts two methods: the overall heat dissipation of the module or the large-scale heat dissipation of the battery cell. Compared with the technical solution without air cooling, although the overall heat dissipation of the module can achieve a certain heat dissipation effect, However, its heat dissipation area is small and its heat dissipation capacity is limited, which is not good for larger battery modules. Compared with the overall heat dissipation of the module, the heat dissipation capacity of the large area of the battery cell has a certain improvement, but due to the space and contact resistance The problem is that the temperature at the front and rear ends of the module is high, and the temperature difference between the battery cells is large, which cannot achieve a better heat dissipation effect.

Therefore, there is an urgent need for an air-cooled battery system to solve the above problems.

Utility model content

The purpose of the utility model is to provide an air-cooled battery system, which has a simple structure and good heat dissipation effect, and the temperature difference between the battery cells is small, which prolongs the service life of the battery cells.

For this purpose, the utility model adopts the following technical solutions:

On the one hand, the utility model provides an air-cooled battery system, including:

A casing, the casing is provided with air inlet holes;

At least two battery modules, at least two of the battery modules are installed in the casing, each of the battery modules includes a number of battery cells arranged at intervals, and the two adjacent battery cells A first air duct is provided between them, and the first air duct communicates with the air inlet hole, and a second air duct is formed between one end of the battery module along the battery cell arrangement direction and the housing, and the The second air duct communicates with the air inlet;

A heat dissipation assembly, the heat dissipation assembly is arranged between two adjacent battery modules, a third air passage is formed in the heat dissipation assembly, and one end of the third air passage is connected to the first air passage and the The second air passage is connected, and the other end of the third air passage is connected with the external environment.

Optionally, the housing includes an upper cover and a lower box assembly that are interlocked with each other, and the lower box assembly is provided with at least two installation positions, and the battery modules correspond to the installation positions one by one. , and the battery module is arranged in the installation position.

Optionally, the heat dissipation assembly includes a heat dissipation air duct, a third air duct is formed inside the heat dissipation air duct, first air inlets are provided on opposite sides of the heat dissipation air duct, and the first air inlets connect the The first air duct communicates with the third air duct;

The tail end of the heat dissipation air duct is provided with a second air inlet, the second air inlet communicates the second air duct with the third air duct, and the head end of the heat dissipation air duct is provided with an air outlet, The air outlet communicates the third air duct with the external environment.

Optionally, the heat dissipation assembly further includes a fan, which is arranged at the air outlet, and the fan is used to generate passive airflow to discharge hot air to the external environment.

Optionally, the heat dissipation air duct includes a main structure and a guide part, the first air inlet and the second air inlet are arranged on the main structure, the guide part is arranged in a trumpet shape, and the guide part The small opening end of the guide part is connected to the main structure, and the large opening end of the guide part forms the air outlet.

Optionally, the main structure includes a top board, a bottom board, two opposite side boards and an end board connected to each other, the first air inlet is dug on the side board, and the second air inlet is set on the end board. board.

Optionally, the second air inlet is a plurality of through holes opened on the end plate, and a plurality of the through holes are arranged at intervals on the end plate, and the through holes communicate with the second air duct and the Describe the third airway.

Optionally, the second air inlet is a groove opened on the end plate, and the groove communicates with the second air passage and the third air passage.

Optionally, a separator is provided between two adjacent battery cells, and a plurality of first air passages are opened in the separator, and the plurality of first air passages are parallel to each other.

Optionally, a U-shaped bracket is provided inside the housing, and the heat dissipation assembly is fixed on the U-shaped bracket.

The beneficial effects of the utility model are:

The utility model provides an air-cooled battery system, which includes a casing, at least two battery modules and a heat dissipation assembly arranged in the casing, and the heat dissipation assembly is sandwiched between two adjacent battery modules. The shell is provided with an air inlet hole, and each battery module includes a number of battery cells arranged at intervals, and a first air duct is provided between two adjacent battery cells, and one end of the battery module along the cell arrangement direction is connected A second air duct is formed between the casings, the first air duct and the second air duct communicate with the air inlet hole, and the third air duct is formed in the cooling assembly, and one end of the third air duct communicates with the first air duct and the second air duct , the other end of the third air channel communicates with the external environment, thereby forming two heat dissipation paths in the casing of the air-cooled battery system. As a result, the first heat dissipation path takes away most of the heat from the battery cells through the large-surface heat dissipation method, reducing the overall temperature of the battery module. The air flow avoids the problem that the cells located at the edge cannot take away the heat due to the influence of space and position, reduces the temperature difference between the cells, and is beneficial to prolong the service life of the cells.

Description of drawings

Figure 1 is an exploded view of the air-cooled battery system provided in Embodiment 1 of the present utility model;

Fig. 2 is a schematic structural diagram of the assembled air-cooled battery system provided in Embodiment 1 of the present utility model;

Fig. 3 is a cross-sectional view of the air-cooled battery system provided in Embodiment 1 of the utility model;

Fig. 4 is a schematic structural diagram of the battery module provided in Embodiment 1 of the present invention;

Fig. 5 is a partial enlarged view of place A in Fig. 4;

Fig. 6 is a schematic structural view of the cooling air duct provided in Embodiment 1 of the present utility model;

Fig. 7 is a structural schematic view of the cooling air duct provided in Embodiment 1 of the present utility model under another viewing angle;

Fig. 8 is a schematic structural view of the heat dissipation air duct provided in the second embodiment of the utility model;

Fig. 9 is a schematic structural view of the cooling air duct provided in the second embodiment of the present invention under another viewing angle.

In the picture:

100, shell; 110, upper cover; 111, air inlet hole; 120, lower box assembly; 121, convex rib; 122, U-shaped bracket; 200, battery module; 210, battery cell; 220, partition; 221, first air duct; 300, cooling air duct; 310, top plate; 320, bottom plate; 330, side plate; 340, end plate; 341, through hole; 342, groove; 350, guide part; 400, fan.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail. It can be understood that the specific embodiments described here are only used to explain the utility model, rather than limit the utility model. In addition, it should be noted that, for the convenience of description, only some structures related to the present utility model are shown in the drawings but not all structures.

In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a Integral; it can be mechanically or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

Embodiment one

As shown in Figures 1-3, this embodiment provides an air-cooled battery system, which includes a casing 100, at least two battery modules 200 and a heat dissipation assembly, at least two battery modules 200 and a heat dissipation assembly They are all arranged in the housing 100 , and the heat dissipation components are sandwiched between two adjacent battery modules 200 . The casing 100 is provided with an air inlet hole 111, and each battery module 200 includes a plurality of battery cells 210 arranged at intervals, and a first air duct 221 is provided between two adjacent battery cells 210, and the first air duct 221 It communicates with the air inlet hole 111, and forms a second air passage between one end of the battery module 200 along the arrangement direction of the battery cells 210 and the casing 100. The second air passage communicates with the air inlet hole 111, and a third air passage is formed in the cooling assembly. One end of the third air duct communicates with the first air duct 221 and the second air duct, and the other end of the third air duct communicates with the external environment, thereby forming two heat dissipation paths in the casing 100 of the air-cooled battery system, wherein, The first heat dissipation path includes the air inlet 111 , the first air channel 221 and the third air channel, and the second heat dissipation path includes the air inlet 111 , the second air channel and the third air channel. The air inlet hole 111 is used as a source of cold air intake. After the cold air enters the housing 100 from the air inlet hole 111, a part of the cold air enters into the first air duct 221 between the battery cell 210 and the battery cell 210 respectively, and Exchange heat with the large surface of the battery cell 210 to take away its heat, and then the hot air after heat exchange with the battery cell 210 enters the third air channel, and flows from the third air channel to the external environment; another part of the cold air comes from the After the air inlet hole 111 enters the housing 100, it flows into the second air duct between the battery core 210 and the housing 100, and exchanges heat with the large surface of the battery core 210 at the edge to take away its heat, and then enters the third air duct. The hot air in the air duct merges, and then flows into the external environment through the third air duct.

Therefore, the air-cooled battery system adopts a large-surface heat dissipation method, and changes the gas flow mode in the air-cooled battery system. Through the setting of the second heat dissipation path, an internal circulation air intake is formed in the casing 100, increasing The air flow inside the housing 100 is improved, and the problem that the battery cells 210 at the edge cannot be taken away due to space and position effects is avoided, thereby reducing the overall temperature of the battery module 200 and reducing the distance between the battery cells 210. The temperature difference is beneficial to prolong the service life of the battery cell 210 .

As an optional solution, the casing 100 in this embodiment includes an upper cover 110 and a lower box assembly 120 that are interlocked with each other. Two battery modules 200 and a set of heat dissipation components are arranged inside the casing 100. The lower box There are two installation positions on the body assembly 120, and the battery modules 200 correspond to the installation positions one by one, and each battery module 200 is arranged in one installation position, and the heat dissipation component is arranged between the two battery modules 200 , and the cooling assembly is fixed on the lower box assembly 120 . Exemplarily, ribs 121 are provided on the inner side wall of the lower box assembly 120, and the lower box assembly 120 is divided into two installation positions by the ribs 121. U-shaped brackets 122 are arranged on the ribs 121 to dissipate heat. The assembly is fixed on the U-shaped bracket 122 . Preferably, there are two U-shaped brackets 122, so as to improve the stability of fixing the heat dissipation assembly.

Referring to Fig. 4 and Fig. 5 , in this embodiment, a separator 220 is provided between two adjacent cells 210, and the cell 210 can be supported by the separator 220, so that the adjacent two There is a certain gap between the battery cells 210. Further, a number of first air ducts 221 extending in the horizontal direction are opened in the separator 220. The first air ducts 221 are parallel to each other, so that cold air can pass through the first air ducts. Road 221 enters into the third air channel.

Referring to Fig. 6 and Fig. 7, the heat dissipation assembly in this embodiment includes a heat dissipation air duct 300, a third air duct is formed inside the heat dissipation air duct 300, first air inlets are provided on opposite sides of the heat dissipation air duct 300, and the first air inlet The air outlet connects the first air duct 221 with the third air duct, the tail end of the cooling air duct 300 is provided with a second air inlet, the second air inlet connects the second air duct with the third air duct, and the head of the cooling air duct 300 The end is provided with an air outlet, and the air outlet connects the third air duct with the external environment. Further, the heat dissipation assembly also includes a fan 400, which is arranged at the air outlet, and the fan 400 can form a passive airflow in the casing 100, so that the cold air can dissipate heat along two heat dissipation paths, thereby improving the air flow in the casing 100. The flow speed speeds up the heat dissipation, and at the same time avoids the poor heat dissipation effect of the battery cells 210 located at the edge due to the influence of space and position, which is beneficial to the rapid heat dissipation of the battery module 200 and the heat dissipation is uniform.

Further, the heat dissipation air duct 300 in this embodiment includes a main structure and a guide part 350, the first air inlet and the second air inlet are arranged on the main structure, the guide part 350 is set in a trumpet shape, and the small opening end of the guide part 350 is connected to the The main structure is connected, the large mouth end of the guide part 350 forms an air outlet, and the fan 400 is arranged on the large mouth end of the guide part 350. On the one hand, the guide part 350 has a certain guiding effect on the hot air flow; on the other hand, the guide part 350 can lower the The hot air flow speeds up at the air outlet to reduce noise.

Exemplarily, the main structure includes a top plate 310, a bottom plate 320, two opposite side plates 330 and an end plate 340, wherein the end plate 340 is connected to the top plate 310, the bottom plate 320 and the two opposite side plates 330, and the end plate 340 is arranged on At the tail end of the heat dissipation air duct 300, first air inlets are dug on the two side plates 330, and each first air inlet is set facing a battery module 200, so that the airflow flowing out of the first air duct 221 can enter smoothly. In the third air duct, the second air inlet is provided on the end plate 340, and there are also two second air inlets, and each second air inlet corresponds to a second air duct. For example, the second air inlet can be set as several through holes 341 opened on the end plate 340 , the several through holes 341 are arranged at intervals on the end plate 340 , and the through holes 341 communicate with the second air channel and the third air channel. In some embodiments, the cross section of the through hole 341 is hexagonal. Certainly, the cross section of the through hole 341 may also be circular, square, etc., which will not be repeated here.

Embodiment two

This embodiment provides an air-cooled battery system. The difference between the air-cooled battery system and the air-cooled battery system in Embodiment 1 is that the specific structure of the cooling air duct 300 is different. Referring to Fig. 8 and Fig. 9, in this embodiment, the heat dissipation air duct 300 includes a main structure, and the main structure includes a top plate 310, a bottom plate 320, two opposite side plates 330 and an end plate 340, wherein the end plate 340 is connected to the top plate 310, the bottom plate 320 and the end plate 340. The two side plates 330 are connected, and the end plate 340 is arranged at the tail end of the heat dissipation air duct 300, and the first air inlets are dug on the two side plates 330, and each first air inlet faces a battery module 200, so that the air flow out of the first air duct 221 can enter the third air duct smoothly, the second air inlet is set on the end plate 340, and the second air inlet is also set to two, and each second air inlet corresponds to Connected to a second air duct.

The second air inlet is a groove 342 opened on the end plate 340. The groove 342 communicates with the second air passage and the third air passage. There are also two grooves 342, and each groove 342 corresponds to a battery module 200. . Exemplarily, the groove 342 can be obtained by cutting the end plate 340 , and the groove 342 is arranged in the middle of the end plate 340 .

The remaining structures in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. Various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (10)

1. An air-cooled battery system, comprising:

a housing (100), wherein an air inlet hole (111) is formed in the housing (100);

the battery module (200) is arranged in the shell (100), each battery module (200) comprises a plurality of electric cores (210) which are arranged at intervals, a first air channel (221) is arranged between every two adjacent electric cores (210), the first air channel (221) is communicated with the air inlet (111), a second air channel is formed between one end of the battery module (200) along the arrangement direction of the electric cores (210) and the shell (100), and the second air channel is communicated with the air inlet (111);

the heat dissipation assembly is arranged between two adjacent battery modules (200), a third air channel is formed in the heat dissipation assembly, one end of the third air channel is communicated with the first air channel (221) and the second air channel, and the other end of the third air channel is communicated with the external environment.

2. The air-cooled battery system according to claim 1, wherein the housing (100) includes an upper cover (110) and a lower case assembly (120) that are fastened to each other, at least two mounting positions are provided on the lower case assembly (120), the battery modules (200) are in one-to-one correspondence with the mounting positions, and the battery modules (200) are disposed in the mounting positions.

3. The air-cooled battery system according to claim 1, wherein the heat dissipation assembly comprises a heat dissipation air duct (300), a third air duct is formed inside the heat dissipation air duct (300), and first air inlets are formed on two opposite sides of the heat dissipation air duct (300), and the first air inlets communicate the first air duct (221) with the third air duct;

the tail end of the heat dissipation air duct (300) is provided with a second air inlet, the second air inlet is used for communicating the second air duct with the third air duct, the head end of the heat dissipation air duct (300) is provided with an air outlet, and the air outlet is used for communicating the third air duct with the external environment.

4. The air-cooled battery system of claim 3, wherein the heat dissipation assembly further comprises a blower (400), the blower (400) being disposed at the air outlet, the blower (400) being configured to generate a passive air flow to expel the hot air to the external environment.

5. The air-cooled battery system according to claim 3, wherein the heat dissipation air duct (300) comprises a main structure and a guide portion (350), the first air inlet and the second air inlet are disposed on the main structure, the guide portion (350) is configured in a horn shape, a small opening end of the guide portion (350) is connected with the main structure, and a large opening end of the guide portion (350) forms the air outlet.

6. The air-cooled battery system of claim 5, wherein the main structure includes a top plate (310), a bottom plate (320), two opposing side plates (330), and an end plate (340) that are connected to each other, the first air intake is dug into the side plates (330), and the second air intake is provided into the end plate (340).

7. The air-cooled battery system according to claim 6, wherein the second air inlet is a plurality of through holes (341) formed in the end plate (340), and a plurality of through holes (341) are arranged at intervals on the end plate (340), and the through holes (341) are communicated with the second air duct and the third air duct.

8. The air-cooled battery system of claim 6, wherein the second air inlet is a groove (342) formed in the end plate (340), and the groove (342) communicates with the second air duct and the third air duct.

9. The air-cooled battery system according to claim 1, wherein a partition plate (220) is arranged between two adjacent electric cores (210), a plurality of first air channels (221) are formed in the partition plate (220), and the first air channels (221) are parallel to each other.

10. The air-cooled battery system of claim 1, wherein a U-shaped bracket (122) is disposed within the housing (100), and the heat sink assembly is secured to the U-shaped bracket (122).

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